Epson 2080 Service Manual - Page 23

Control Circuit - diagram

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LQ-2080 2.3 Control Circuit The control circuit consists of the C273 Main Board assembly and C165 PNL board This section describes the major components and explains how the boards work. 2.3.1 Overview of Control Circuit Operation The printer's control circuit includes a TMP96C041BF CPU that runs at 19.66 MHz, an E05B24YB gate array, a 1M bit PS-RAM (8-bit bus, less than 100ns), a bit PROM (8-bit bus, less than 100ns), CG (Standard Version) or CG (NLSP Version). It oversees control of all the components in the printer. The following chart shows you a block diagram of the control circuit. Revision A Operating Principles Figure 2-1. Control Circuit Block Diagram Control Circuit 23

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LQ-2080
Revision A
Operating Principles
Control Circuit
23
2.3
Control Circuit
The control circuit consists of the C273 Main Board assembly and C165
PNL board This section describes the major components and explains
how the boards work.
IC
7 ( n o t m
o u n te d )
IC
6 (C
G
-R
O
M
)
*1
IC
8 (1M
P
S
-R
A
M
C
N
15(P
N
L board)
C
N
1(P
a r a lle l I/F )
C
N
2 (Type B
I/F )
C
N
14 (O
p tio n C
S
F)
C
N
17 (Fan)
*2
C
N
6 (P
E
- F r o n t)
IC
4 (TM
P
96C
)
C
N
5 (P
E
-R
ear)
C
N
7 (Top)
C
N
4 (C
R
H
P
)
C
N
16(R
e le a s e 2 )
C
N
12(R
e le a s e 1 )
C
N
13(P
G
1)
IC
2(P
S
T592)
IC
11(S
LA
7024M
C
N
11(C
R
)
IC
12(A
2917)
C
N
10(P
F)
C
N
3 ( fr o m
P
S
)
IC
3 (E
05B
42)
C
N
8
T r .( Q
4-25)
C
N
9
IC
5(A
T93C
45)
A
ddress
IC
10 (P
-R
O
M
)
*1
D
a ta
*1:
R
e fe r to th e C
h a p te r 1 / M
a in C
om
p o n e n t / T a b le " R
e la
* 2 :C
N
1 7 o n th e m
a in b o a r d is n o t u s e d b e c a u s e p o w
e r fo r
fr o m
th e p o w
e r s u p p ly b o a r d . T h e r e fo r e , C
N
1 7 is n o t u s
Figure 2-1.
Control Circuit Block Diagram
2.3.1
Overview of Control Circuit Operation
The printer's control circuit includes a TMP96C041BF CPU
that runs at 19.66 MHz, an E05B24YB gate array, a 1M bit
PS-RAM (8-bit bus, less than 100ns), a bit PROM (8-bit bus,
less than 100ns), CG (Standard Version) or CG (NLSP
Version). It oversees control of all the components in the
printer. The following chart shows you a block diagram of the
control circuit.